Seiko Cal. 0728 - 641

Seiko 0728-641

The 0728-641 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 0728 caliber with 26j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-03beda2bf0a7]

Also known as: Tuna, Flighty

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
39mm
Case Thickness
10.7mm
Lug Width
21mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Black
Jewels
26j
Frequency
36,000 bph
Power Reserve
40 hours
Year
1982

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